If you freeze it, the only thing Id worry about is chlorine. If you can use Brita or the like to clean that out, I wouldn't use any sanitizer. It would be a waste of money and risking flavor contribution or unintended consequences.

If you freeze it, the only thing Id worry about is chlorine. If you can use Brita or the like to clean that out, I wouldn't use any sanitizer. It would be a waste of money and risking flavor contribution or unintended consequences.

So if i use the sanitizer in the carboy and there is some left over, it may effect the flavor o the beer?

So if i use the sanitizer in the carboy and there is some left over, it may effect the flavor o the beer?

Leftover flavor from undrained sanitzer is far less concentrated sanitizer than an icecube formed from mixed solution. Semi scientific taste tests have proven that carboys that havent dried should not contribute flavor, but when you have a gallon or more of sanitizer solution mixing into the beer, I would be leary.